Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "[Functest][Apex] Use v3 credentials"
  - [Functest][Apex] Use v3 credentials

    Soon, Functest will start using only public endpoints
    and will remove admin connectivity to the deployments.

    Change-Id: I2089ccd3d6e7f1acda7b46d3104a8a78a47af8ff
    Signed-off-by: jose.lausuch <jose.lausuch@ericsson.com>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 2cae87b..f49d86b 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 2cae87b83cff1ffd628acda6adc24415998a7b1d
+Subproject commit f49d86bbc83fa0a7c38728a2503a970a32f94f88